linux-kernel - [PATCH v1 4/4] LoongArch: Guard percpu handler under !CONFIG_PREEMPT

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Message-ID: <20260120092331.813-5-yangtiezhu@loongson.cn>
Date: Tue, 20 Jan 2026 17:23:31 +0800
From: Tiezhu Yang <yangtiezhu@...ngson.cn>
To: Huacai Chen <chenhuacai@...nel.org>
Cc: loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 4/4] LoongArch: Guard percpu handler under !CONFIG_PREEMPT_RT

After commit 88fd2b70120d ("LoongArch: Fix sleeping in atomic context for
PREEMPT_RT"), it should guard percpu handler under !CONFIG_PREEMPT_RT to
avoid redundant operations.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/loongarch/kernel/unwind_prologue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/loongarch/kernel/unwind_prologue.c b/arch/loongarch/kernel/unwind_prologue.c
index d04498d8090e..da07acad7973 100644
--- a/arch/loongarch/kernel/unwind_prologue.c
+++ b/arch/loongarch/kernel/unwind_prologue.c
@@ -61,7 +61,7 @@ static inline bool scan_handlers(unsigned long entry_offset)
 
 static inline bool fix_exception(unsigned long pc)
 {
-#ifdef CONFIG_NUMA
+#if defined(CONFIG_NUMA) && !defined(CONFIG_PREEMPT_RT)
 	int cpu;
 
 	for_each_possible_cpu(cpu) {
-- 
2.42.0